Viessmann VITODENS 100-W Installation And Service Instructions Manual page 37

Further details regarding the individual steps
Commissioning, inspection, maintenance
(cont.)
04. Adjust the upper heating output:
Turn rotary selector "tr" to the
control range on the right until the
display shows 5 bars for the upper
heating output.
05. Check the CO
2
heating output.
The CO content must be between
2
7.0 and 10.5 %.
06. Adjust the lower heating output:
Turn rotary selector "tr" to the
control range on the left until the dis-
play shows 1 bar for the lower heat-
ing output.
07. Check the CO
2
heating output.
The CO content must be between
2
0.3 and 0.9 % below the value for
the upper heating output.
08. ■ If the CO content is within the
2
given range, continue with point
10.
■ If the CO content is outside the
2
given range, check the flue gas/
ventilation air system for tight-
ness; remedy any leaks.
Replace gas train if required.
09. Check the CO
2
and lower heating output again.
10. Shut down the boiler, remove the
flue gas analyser and cap flue gas
aperture A.
content for the upper
content for the lower
content for upper
37